EPC901 Datasheet, PDF (22/37 Pages) Espros Photonics corp – CCD line sensor 1024x1 pixel

Bit no.
Bit name
Operation
Default
OSC_TRIM_RANGE_REG
7
6
5
4
3
2
1
0
n/a
n/a
n/a
n/a
n/a
n/a
n/a
OSC_TRIM_RANGE_UP
n/a
n/a
n/a
n/a
n/a
n/a
n/a
R/W
n/a
n/a
n/a
n/a
n/a
n/a
n/a
0
Table 10: Description of register OSC_TRIM_RANGE_REG (available from revision number 0x14)
OSC_TRIM_RANGE_UP
Defines oscillator trim range:
0: default oscillator trim range (as on chip revisions epc901_018 and epc901_019)
1: oscillator frequency increased by 25%
The bit OSC_TRIM_RANGE_UP can be regarded as an additional oscillator trim bit providing a course frequency trim step of +25%. For
fine trimming use the bits OSC_TRIM as described hereafter.
OSC_TRIM_REG
Bit no.
7
6
5
4
3
2
1
0
Bit name
n/a
n/a
n/a
n/a
OSC_TRIM
Operation
n/a
n/a
n/a
n/a
R/W
Default
n/a
n/a
n/a
n/a
0x0
Table 11: Description of register OSC_TRIM_REG
The trim range of OSC_TRIM is approx. 1.2MHz per step:
Bit no.
Trim Value (MHz)
3
2
1
0
1
0
0
0
-9.6
1
0
0
1
-8.4
1
0
1
0
-7.2
1
0
1
1
-6.0
1
1
0
0
-4.8
1
1
0
1
-3.6
1
1
1
0
-2.4
1
1
1
1
-1.2
0
0
0
0
0 (center frequency)
0
0
0
1
+1.2
0
0
1
0
+2.4
0
0
1
1
+3.6
0
1
0
0
+4.8
0
1
0
1
+6.0
0
1
1
0
+7.2
0
1
1
1
+8.4
Table 12: Oscillator trimming
© 2016 ESPROS Photonics Corporation
Characteristics subject to change without notice
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Datasheet_epc901-V5.6
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